Highest boiling point

1. The problem statement, all variables and given/known data
Of the following compounds, which has the highest boiling point?

(A) CH3—CH3

(B) CH3—CH2OH

(C) CH3—COOH

(D) CH3—COH

(E) H2S

2. Relevant equations
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3. The attempt at a solution
Chose C because is more polar with the 2 oxygens, however, the answer has conflicting answer. It says its E while explaining why its C. Can someone confirm which one is right? Thanks!